CD74ACT164EE4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
CD74ACT164EE4 is an 8-bit serial-in, parallel-out shift register from Texas Instruments in the ACT high-speed CMOS logic family. Key specs: 70 MHz maximum clock frequency, 5 V supply, 24 mA output sink current, and 14-pin DIP package. Available worldwide with in-stock inventory and fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- CD74ACT164EE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CD74ACT164EE4?
- 8-bit serial-to-parallel conversion at up to 70 MHz clock frequency for high-speed data expansion
- ACT family TTL-compatible inputs accepting 5 V logic levels for direct interfacing with standard microcontrollers
- 24 mA output sink current per pin enabling direct LED or bus driving without external buffers
- Compact 14-pin DIP package with 50 pF load capacitance rating for reliable breadboard and through-hole PCB use
What is CD74ACT164EE4 used for?
CD74ACT164EE4 is commonly used in embedded systems to expand microcontroller I/O by converting a 2-wire serial SPI bus into 8 parallel output lines for driving LEDs, relays, or display segments. Its 70 MHz clock capability makes it suitable for high-speed data deserialization in FPGA peripheral interfaces and industrial automation controllers. It also serves in test equipment and communication systems where serial bitstreams need to be converted to parallel byte-wide data at high throughput.
What are the specifications of CD74ACT164EE4?
| YTEOL | 0 |
| Count Direction | RIGHT |
| Family | ACT |
| JESD-30 Code | R-PDIP-T14 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | SERIAL IN PARALLEL OUT |
| Max Frequency@Nom-Sup | 70000000Hz |
| Max I(ol) | 0.024A |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP14,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.16mA |
| Prop. Delay@Nom-Sup | 13.5ns |
| Propagation Delay (tpd) | 14.9ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 70MHz |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia, Mexico |
Where can I find the CD74ACT164EE4 datasheet?
CD74ACT164EE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74ACT164EE4?
Compatible alternatives and drop-in replacements for CD74ACT164EE4:
8-Bit, Right Direction, True Output, CMOS, PDIP14
Frequently Asked Questions
What is the maximum clock frequency of CD74ACT164EE4, and how does it compare to standard HC-family shift registers?
CD74ACT164EE4 operates at a maximum clock frequency of 70 MHz, which is approximately 2 to 3 times faster than standard 74HC164 parts that typically max out near 25 MHz at 5 V. The ACT family uses TTL-compatible input thresholds, which also allows direct interfacing with 5 V TTL logic without level-shifting components. This speed advantage is useful in FPGA peripheral expansion and high-throughput serial-to-parallel data conversion applications.
How much output current can each parallel output of CD74ACT164EE4 sink, and what does this enable in LED driving?
Each output of CD74ACT164EE4 can sink up to 24 mA, which is sufficient to directly drive standard LEDs requiring 10 mA to 20 mA without an external current buffer transistor. This reduces BOM cost and PCB trace complexity compared to using a separate driver IC. For 8-segment LED display interfaces, all 8 outputs can be used simultaneously with appropriate current-limiting resistors, typically 220 ohm at 5 V for 10 mA per LED.
Which serial bus protocol does CD74ACT164EE4 use for input, and how many wires does it require from the microcontroller?
CD74ACT164EE4 accepts serial data through a 2-wire interface consisting of a clock line and a serial data input, compatible with the SPI protocol in the absence of chip-select when the device is always enabled. A single microcontroller GPIO pin drives the serial data and another drives the clock, freeing up to 6 additional GPIO pins compared to an 8-bit parallel interface. Multiple CD74ACT164EE4 devices can be daisy-chained to extend the output count to 16, 24, or 32 bits using the same 2-wire connection.
What is the package type of CD74ACT164EE4 and why is it suitable for prototype and production PCB designs?
CD74ACT164EE4 comes in a 14-pin DIP (dual in-line package) with 2.54 mm lead pitch, making it compatible with standard breadboards and through-hole PCB footprints used in rapid prototyping. The DIP package withstands hand soldering and rework more easily than surface-mount alternatives, reducing assembly cost in low-volume production runs. At a 50 pF rated load capacitance per output, the package's pin inductance remains low enough for reliable 70 MHz operation in properly bypassed circuit designs.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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